EP3335301A1 - Stator d'une machine électrique - Google Patents

Stator d'une machine électrique

Info

Publication number
EP3335301A1
EP3335301A1 EP16729922.1A EP16729922A EP3335301A1 EP 3335301 A1 EP3335301 A1 EP 3335301A1 EP 16729922 A EP16729922 A EP 16729922A EP 3335301 A1 EP3335301 A1 EP 3335301A1
Authority
EP
European Patent Office
Prior art keywords
stator
shielding
slot
stator according
shielding element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16729922.1A
Other languages
German (de)
English (en)
Other versions
EP3335301B1 (fr
Inventor
Armin Elser
Jochen Reiter
Fabian Lange
Daniel Gremmel
Johannes Horn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3335301A1 publication Critical patent/EP3335301A1/fr
Application granted granted Critical
Publication of EP3335301B1 publication Critical patent/EP3335301B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/014—Shields associated with stationary parts, e.g. stator cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding

Definitions

  • the invention is based on a stator of an electrical machine according to the preamble of the main claim.
  • Rotor laminated core provided grooves in which electrical conductors of an electrical winding are arranged and which are each closed by a NutverBankelement, each comprising an electrically insulating support member and a disposed on the support member shielding of electrically conductive material.
  • a NutverBankelement each comprising an electrically insulating support member and a disposed on the support member shielding of electrically conductive material.
  • Main claim has the advantage that the space required in each case for the groove closure element space is reduced by the shielding is a coating, a paint layer, a foil or a sheet.
  • the grooves each have a groove bottom and a groove opening facing away from the groove opening, the shielding element in each case in the
  • Slot opening or is arranged in the region immediately below the slot opening.
  • a plurality of shielding elements are arranged in the axial direction with respect to the stator axis on at least one of the Nutver gleich institute, which are electrically separated from each other and electrically connected at least one side to the stator lamination.
  • the shielding elements have a large surface area on the carrier element, so that the shielding effect is only insignificantly reduced by the interruptions.
  • a single, strip-shaped shielding element is provided on at least one of the slot closure elements, which has a width measured transversely to the axial direction, which is smaller than the width of a slot opening of the associated groove, and the at least one web with the Stator laminated core is electrically connected.
  • Embodiment because of the lack of interruptions greater than in the first embodiment, so that here too the shielding effect is sufficiently given.
  • the at least one shielding element is adhesively bonded, welded, painted, sprayed on, dropped on or vapor-deposited onto its carrier element.
  • the shielding can be particularly easy to apply to the slot closure elements.
  • the painting, dripping or vapor deposition is an embodiment which also allows a subsequent application of the shielding elements on the slot closure elements, ie after the electrical conductors and the slot closure elements are already introduced into the grooves.
  • the at least one shielding element is made of aluminum, copper, silver or gold and / or is in each case designed as a varnish.
  • Fig.l shows a sectional view of the stator according to the invention after a first
  • FIG. 3 is a plan view of one of the grooves of the stator according to the invention according to Fig.l according to a second embodiment
  • FIG. 4 shows a sectional view of the stator according to the invention after a third
  • Fig.l shows a sectional view of a stator 1 according to the invention an electric machine according to a first embodiment.
  • the stator 1 has a laminated stator core 2 and grooves 3 provided in the laminated stator core 2, which run, for example, in the direction of a stator axis 4 of the laminated stator core 2 and in which electrical conductors 5 are arranged at least one electrical winding.
  • the laminated stator core 2 is formed from a stack of laminations made of electrical steel, between each of which an insulation for Avoidance of eddy currents is provided.
  • the grooves 3 of the stator 1 are each formed between teeth 1.1 of the stator 1 and each have a groove bottom 3.1 and a slot groove 3.1 facing away from the slot-shaped groove opening 3.2.
  • the cross-section of the slot openings 3.2 of the stator 1 is in each case narrowed, since the teeth 1.1 of the stator 1 at their end facing away from the groove bottom 3.1 each have a cantilever tooth head 1.2 projecting shoulder-shaped in the respective groove 3.
  • the groove openings 3.2 of the grooves 3 are each closed by a NutverInstitutelement 6, which holds the electrical conductor 5 within the respective groove 3.
  • the slot closure elements 6 each comprise an electrically insulating carrier element 6.1 and at least one shielding element 6.2 made of electrically conductive material arranged on the carrier element 6.1.
  • the support element 6.1 can each one
  • Insulation paper in particular of synthetic aromatic polyamide polymer, or an insulating film or an insulating tape.
  • synthetic aromatic polyamide polymer or an insulating film or an insulating tape.
  • Cross-section U-shaped support element 6.1 has two legs, respectively, which rest on opposite walls of the respective groove 3, and has a connecting the two legs support portion on which the shield 6.2 is provided.
  • the at least one shielding element 6.2 of the slot closure elements 6 is arranged on the side facing away from the electrical conductors 5 side of the support element 6.1 and serves to the electric field to the rotor of the electric machine
  • the at least one shielding element 6.2 is applied in each case to the slot closure elements 6 in a first step.
  • the finished slot closure elements 6 are inserted in a second step as a component in the respective groove 3.
  • the slot closure elements 6 are inserted into the grooves 3 in such a way that their support elements 6.1 each in the associated groove 3 immediately below the
  • Toothed heads 1.2 and their at least one shielding 6.2 each at least partially in the slot-shaped groove opening 3.2 between the tooth tips 1.2 is arranged.
  • Nutver gleiche 6 each have an electrical contact of the at least one shielding 6.2 to
  • the shielding 6.2 in the first embodiment are each made wider than the slot openings 3.2 of the stator 1, so that the shield 6.2 extend beyond their slot opening 3.2 out in the region of the groove 3 below the respective tooth heads 1.2 and each of the Shoulders of the tooth tips 1.2 are electrically contacted.
  • FIG. 2 shows a plan view of one of the grooves 3 of the stator according to the invention according to Fig.l.
  • a plurality of shielding elements 6.2 are arranged one behind the other in axial direction with respect to the stator axis 4 on at least one, for example on each of the slot closure elements 6, wherein these shielding elements 6.2 are electrically separated from one another and respectively on at least one side, for example on both sides, with the laminated stator core 2 are electrically connected.
  • the shielding elements 6.2 of the stator 1 are each made of aluminum, copper, silver or gold according to the first embodiment.
  • the distance A between the example rectangular or square shielding 6.2 is, for example, each 0.1 to 0.9 millimeters, in particular 0.5 millimeters. Due to this small distance between the shielding 6.2 is despite the
  • the shielding elements 6.2 each have a thickness between 10 and 100 micrometers.
  • the slot closure elements 6 protrude out of their grooves 3, for example in the axial direction with respect to the stator axis 4.
  • the shielding elements 6 of the slot closure elements 6 can additionally exert a shielding effect in a region between a winding head of the stator 1 and a short-circuit ring of the rotor 7, since in this way a capacitive coupling between the winding head of the stator 1 and the short-circuit ring of the rotor 7 is prevented
  • 3 shows a plan view of one of the grooves 3 of the stator according to the invention according to Fig.l according to a second embodiment.
  • the second embodiment differs from the first embodiment
  • Embodiment is that on at least one of the Nutver gleich institute 6 each have a single, strip-shaped shield 6.2 is provided which has a measured transversely to the axial direction width Bl, which is smaller than the width B2 of the slot opening 3.2 of the associated groove 3, and about at least one, for example, two webs 10 is electrically connected to the stator lamination 2.
  • the shielding element 6.2 is thereby electrically connected exclusively via the at least one web 10 to the laminated stator core 2, wherein the at least one web 10 has a width B3 measured in the axial direction relative to the stator axis 4, that of the thickness D of one or more laminations of the laminated stator core 2 may correspond, for example, in the range between 5 millimeters and 5 centimeters.
  • the shielding 6.2 are each designed as a continuous, rectangular strip on which, for example, the webs 10 are provided centrally and on both sides.
  • Shielding 6.2 protrudes as in the first embodiment of the tooth heads 1.2 of the respective groove 3 and is contacted in this way at the shoulders of the tooth tips 1.2 electrically.
  • FIG. 4 shows a sectional view of the stator according to the invention according to a third embodiment. In the apparatus of Figure 4 are opposite to the
  • the third embodiment differs from the two previous embodiments in that the shielding 6.2 are formed on at least one, for example, each of the Nutver gleich institute 6 as a lacquer layer of electrically conductive paint.
  • This electrically conductive lacquer in contrast to the previous embodiments, only after arranging the
  • FIG 5 shows a plan view of one of the grooves of the stator according to the invention according to Figure 4.
  • the shielding elements 6.2 arranged one behind the other in the axial direction on one of the slot closure elements 6 are made of an electrically conductive lacquer. To arrange these several, one behind the other
  • Shielding elements 6.2 of one of the slot closure elements 6 are each formed according to the third embodiment hyperboloid-shaped, but may also have any other shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

On connaît déjà un rotor d'une machine électrique, avec un empilage de tôles de rotor comprenant un axe de rotor et avec des gorges, disposées dans l'empilage de tôles de rotor, dans lesquelles sont disposés des conducteurs électriques d'un enroulement électrique et qui sont enfermées chacune par un élément de fermeture de gorge qui comporte un élément support électriquement isolant et un élément de blindage, fait d'un matériau électroconducteur et disposé sur l'élément support. Cela présente l'inconvénient que l'exécution de l'élément de fermeture de gorge est très complexe. Cela entraîne des coûts de fabrication surélevés ainsi que la nécessité d'une adaptation individuelle de l'élément de fermeture de gorge à la forme de gorge en question. L'isolation du matériau électroconducteur sert exclusivement à l'isolation avec l'enroulement électrique. Avec le stator selon l'invention, l'espace de montage concerné, nécessaire pour l'élément de fermeture de gorge dans les gorges, est réduit. Selon l'invention, le ou les éléments de blindage (6.2) d'un des éléments de fermeture de gorge (6) sont formés par un revêtement, une couche de vernis, un film ou une tôle.
EP16729922.1A 2015-08-14 2016-06-17 Stator d'une machine électrique Active EP3335301B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015215588.9A DE102015215588A1 (de) 2015-08-14 2015-08-14 Stator einer elektrischen Maschine
PCT/EP2016/064101 WO2017028993A1 (fr) 2015-08-14 2016-06-17 Stator d'une machine électrique

Publications (2)

Publication Number Publication Date
EP3335301A1 true EP3335301A1 (fr) 2018-06-20
EP3335301B1 EP3335301B1 (fr) 2020-04-22

Family

ID=56134369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16729922.1A Active EP3335301B1 (fr) 2015-08-14 2016-06-17 Stator d'une machine électrique

Country Status (4)

Country Link
EP (1) EP3335301B1 (fr)
CN (1) CN107925295B (fr)
DE (1) DE102015215588A1 (fr)
WO (1) WO2017028993A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017208634A1 (de) * 2017-05-22 2018-11-22 Audi Ag Deckschieber
DE102017218451A1 (de) * 2017-10-16 2019-04-18 Robert Bosch Gmbh Stator und elektrische Maschine mit Stator
US20190181713A1 (en) * 2017-12-11 2019-06-13 Hyundai Motor Company Drive motor for vehicle
DE102018217904A1 (de) 2018-10-18 2020-04-23 Robert Bosch Gmbh Motorkomponente sowie Elektromotor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5163102U (fr) * 1974-11-13 1976-05-18
JPS51121106A (en) * 1975-04-16 1976-10-22 Hitachi Ltd Revolving electric machine
GB2268337B (en) * 1992-07-01 1996-06-05 Gec Alsthom Ltd Electrical machine slot wedging system
US5979087A (en) * 1998-01-16 1999-11-09 Reliance Electric Industrial Company Electric motor having electrostatic shield arrangement
JP2001268827A (ja) * 2000-03-21 2001-09-28 Toshiba Corp 回転電機の回転子
DE10329678A1 (de) * 2003-07-01 2005-02-03 Siemens Ag Elektromotor für einen Antrieb eines Fahrzeugs, insbesondere Bahnantriebe, sowie einen Antrieb mit einem solchen Elektromotor
JP4665566B2 (ja) * 2005-03-15 2011-04-06 パナソニック株式会社 回転電機
DE102010042175A1 (de) 2010-10-07 2012-04-26 BSH Bosch und Siemens Hausgeräte GmbH Elektrische Maschine mit Nutkeilen
CN104362785A (zh) * 2014-10-27 2015-02-18 陕西航空电气有限责任公司 一种加厚电机绕组槽绝缘及其加工方法

Also Published As

Publication number Publication date
WO2017028993A1 (fr) 2017-02-23
EP3335301B1 (fr) 2020-04-22
CN107925295B (zh) 2020-09-01
CN107925295A (zh) 2018-04-17
DE102015215588A1 (de) 2017-02-16

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